Added Image class/model
Added Image class/model

Class that represent a image of the gallery, images have the following
    properties:

    ``image``
        The image, thumbnail will be generated with this image
(required).

    ``active``
        A boolean that allows to deactivate an image without removing it
        completely, if set to ``False``, the image will not appear in
the
        gallery (default: True).

    ``order``
        An integer representing the order (position) of the image in the
        gallery (default: 0).

jasekz/cmsplugin-filery,Alir3z4/cmsplugin-filery